Steel construction of industrial and civil facilities are called steel, steel mainly refers to the main load-bearing elements are made of steel composition. Including steel columns, beams, steel base, steel roof (of course, relatively large span of the plant, are now basically a steel roof trusses), steel roof, attention steel brick walls can also be used for maintenance. As China's steel output increases, many are beginning to use steel plant, the specific points can also light and heavy steel plant. A light steel construction quality, high strength, span. . Span the greater use of superiority and economic effects of such a structure is also more significant. From a plurality of rods in accordance with certain nodes linked together by a grid of spatial structure. Force has the advantage of space, light weight, stiffness, good seismic performance; used as a gymnasium, a theater, an exhibition hall, waiting room, stadium bleachers awning, hangars, two-way large column grid structure of houses and other buildings from the workshop cover. The disadvantage is that the lever on the node in a larger number of submitters, fabrication and installation of complex structure than the plane. Mainly divided into three categories: The first category is composed by plane truss system, there are two orthogonal being put to the grid, the two orthogonal diagonal grid, two to four forms of bias diagonal grid and three-way grid ; The second class consists of tetrapod units, there Pyramid grid, are taking the time to put the square pyramid grid, diagonal square pyramid grid, checkerboard square pyramid shaped grid and grid star PYRAMIDIC five forms ; The third class consists of a triangular pyramid units, there are cones grid, taking the triangular cone-shaped cones honeycomb grid and grid three forms. Shell by shell surface grid structure in the form of the main points are cylindrical shell grid, spherical shell hyperbolic paraboloid shell grid and grid. Grid structure of the materials used by the steel grid points, reinforced concrete and steel and reinforced concrete grid consisting of a combination of grid, which used more steel truss. Section rod grid structure should be determined based on the strength and stability of the calculation. In order to reduce the length of the bar is calculated to increase its stability, can add another sub-par and the support bar and other measures. Plate grid and grid nodes double shell made of steel, mainly vane nodes welded hollow spherical joints and three forms of bolt ball node. Vane node grid structure applies, bars and gusset plate connection type steel parts, using welding or high-strength bolted. Hollow spherical joints and bolt-node network structure suitable for steel pole pieces. Single shell grid nodes should be able to withstand bending internal forces, under normal circumstances, the consumption of steel accounted for 15 nodes to 20% of total steel consumption of steel truss structure. Construction and installation of: construction and installation methods grid structure divided into two categories: one is on the ground the whole assembly of jacking method, enhancing the overall law and the overall lifting method; the other is the high altitude place bulk, slitting block in place assembly and assembly method altitude slip in place. ????? Qujing victory tank factory is specialized in the production and installation of steel truss design for the integration of the business. And to undertake a variety of sizes span steel plant, steel plant, steel warehouses, heavy steel, light steel structure. Charging station grid, light steel plant, bolt ball rack, ball grid welding knot, spherical grid, Wangjiagongcheng; ceiling, canopy and other related steel structure engineering manufacture, Pins: welding cabbage, bolt ball . Various gas station ceiling, gas grid, gas pipelines and tanks of various mixing station equipment design and installation.